Process Model doesn't trigger if i send attachment with the email, else working fine

 through email process model is been triggered successfully but whenever i tried to send some attachment with the email, the process doesn't run and it gives some error, which is stated as:

 

 

Problem:  An error has occurred in evaluation of an expression for a Start Event.

Details:  ERROR:EVAL:@reason=Invalid bean property name 'Attachments' (valid properties are cc;mime_version;x_ms_exchange_organization_authmechanism;ccnames;x_ms_exchange_organization_scl;tonames;recipients;x_ms_exchange_organization_authsource;recipientsemails;recipient

Recommended Action:  Examine and correct the expressions on the Start Event's Event Properties.

 

Please suggest me , what should i do??

  Discussion posts and replies are publicly visible